Save up to $499! Grab all Python courses for $49 or all online courses we’ve ever launched for only $169. Only Feb 11-16. Happy Valentine's!
Challenge time


Keep it up, and don't give up!


For each group, show its ID (as group_id), language, and level, together with the ID of the room they're in and the days when they have lectures. Consider only those groups whose lectures are always held in the same room.